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<title>The C Preprocessor: C++ Named Operators</title>

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<a name="C_002b_002b-Named-Operators-1"></a>
<h4 class="subsection">3.7.4 C++ Named Operators</h4>
<a name="index-named-operators"></a>
<a name="index-C_002b_002b-named-operators"></a>
<a name="index-iso646_002eh"></a>

<p>In C++, there are eleven keywords which are simply alternate spellings
of operators normally written with punctuation.  These keywords are
treated as such even in the preprocessor.  They function as operators in
&lsquo;<samp>#if</samp>&rsquo;, and they cannot be defined as macros or poisoned.  In C, you
can request that those keywords take their C++ meaning by including
<samp>iso646.h</samp>.  That header defines each one as a normal object-like
macro expanding to the appropriate punctuator.
</p>
<p>These are the named operators and their corresponding punctuators:
</p>
<table>
<tr><td>Named Operator</td><td>Punctuator</td></tr>
<tr><td><code>and</code></td><td><code>&amp;&amp;</code></td></tr>
<tr><td><code>and_eq</code></td><td><code>&amp;=</code></td></tr>
<tr><td><code>bitand</code></td><td><code>&amp;</code></td></tr>
<tr><td><code>bitor</code></td><td><code>|</code></td></tr>
<tr><td><code>compl</code></td><td><code>~</code></td></tr>
<tr><td><code>not</code></td><td><code>!</code></td></tr>
<tr><td><code>not_eq</code></td><td><code>!=</code></td></tr>
<tr><td><code>or</code></td><td><code>||</code></td></tr>
<tr><td><code>or_eq</code></td><td><code>|=</code></td></tr>
<tr><td><code>xor</code></td><td><code>^</code></td></tr>
<tr><td><code>xor_eq</code></td><td><code>^=</code></td></tr>
</table>




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